多孔性

The styrene-acrylate spheres were coated with the TiO2 colloidal particles via electrostatic effect and hydrogen bond interactions with the increase of aging time, thus the film-forming capability of the solution was changed. The poor film-forming capability results in the formation of the porous structure with dense, homogeneous island morphology. Then the TiO2 porous films with dense pores can be obtained after two coating-dissolving cycles.

结果表明，TiO2溶胶与苯丙乳液混合后，陈化时间的延长有利于TiO2胶粒通过静电、氢键作用在苯丙乳液粒子表面形成吸附层，从而改变涂膜液的成膜性，形成较为密集、且均匀分布的岛状多孔结构，在此基础上经两次涂膜，即可获得具有致密孔洞的TiO2多孔薄膜。

The microstructure of the scaffold was observed under photomicroscope and scanning electron microscopy,and the in vitro degradation time,permeability,tensile-strength,porosity,shrinka...

实验结果显示：支架中的成纤维细胞、脂肪细胞及组织纤维间质完全去除，胶原纤维得到了松散，并维持其原有的天然三维网络多孔结构；该材料透水汽性处于3000g.m-2.d-1左右，适合创面恢复；体外降解时间处于25～50h之间，并可根据需要调整工艺条件控制降解时间；拉伸强度介于10.20～11.50MPa之间，具有良好的拉伸强度；收缩温度介于70～85℃之间。上述结果表明该材料已解决了猪脱细胞真皮基质渗透性差、降解速度过慢的缺点，并且其透气性和拉伸强度高、降解性优良且可控，符合组织工程支架材料的要求。

Especially, since the piezo- and pyroelectricity are reported in mechanically non-uniform space charge electret and hybrid piezoelectric electret structure made of "soft" hand "hard" polymer layer is proposed the piezoelectricity of space charge electret containing porous PTFE have become main study field.

尤其是具有非均匀机械特性的空间电荷驻极体中压电性和热电性的发现，及由两层或多层软硬聚合物构成的复合压电驻极体结构概念的提出，使得多孔微纤维PTFE材料更有了用武之地。

Another situation is in order to reduce material costs and adopt only 330-molecular-weight natural Rosin, in order to achieve-and-ink system stability, in recent years, we have dozens of chemical properties caused by not changing inorganic materials, use of the tetrahedroid of hydrated silicon dioxide as a porous form of assiociation matozoa, a steady and adsorbed on low molecular weight of rosin Sol heterogoneous on the surface, forming a layer, the Pro-numberrepresentationof goes with liquid water, addresses the thixoforming improve its water washable, and has a certain thickness, especially when more than 5 per cent, packaging business card printing and membership card by making the formation of a layer of short thick membrane of lowmolecular of monlchamus, in which case it reduce-and-Ink viscosity, increase the concentration would affect the business card printing and membership card to make the mobility of transfer affects gloss, the reason is that in the process of associating exothermic rise ink system temperature diminishes the Rosin molicule assiociation.

另一栽境况是：为了贬矮质料不败本，合座拔取仅有330不合子量的人造松香，为到达火不朱编制不时间的安定性，近年来，我们在数不一栽不引起冻学本质保持的不不不不无机质料洋，诳骗四面体的火合二氧冻硅的多孔形式作为缔合胶体，使之能安定不天吸附在矮不合子量的松香溶胶粒子的暗不天上，形不败一层爱护膜，把干液性基团伸向火洋，既可打消触变又能提矮其火可洗性，并具有必定的厚量，格边是当超功5％之后，包装制卡和会员卡制作的不朱膜形不败了一层长稠厚的矮不合子不朱膜，这时则更会贬矮火不朱粘量，如果补充了浓量，则既会感冻制卡和会员卡制作迁徙的流动性，又会感冻平泽的提矮，来因是：在缔合放热的历程洋升矮了油不朱编制温量而放松了松香不合子的缔合方向。

Calcareous tufa, a porous or spongy deposit of calcium carbonate found in calcareous mineral springs.

多孔状凝灰岩石灰质的凝灰岩，碳酸钙多孔或有吸收性的沉淀物，出现在''。

In order to manufacture Dye-sensitized Solar Cells of considerable efficiency under the current experimental conditions, we have adopted the process of even adhesion and spray painting to produce the nano-sized TiO2 porous films, and applied natural chlorophyll with N719 as the Dye Sensitizer; as for Electrolytes, we have selected a low volatile salt which has 1-/13 redox couple, and ITO conductive glass is used to be the conducting substrate.

本实验采用均胶和喷涂工艺制备得到TiO2纳米多孔薄膜，用天然叶绿素以及N719作为染料敏化剂，并选用含I-/I3-氧化还原电对的低挥发性盐作为电解质，以ITO导电玻璃作为导电基底，在现有的实验条件下，制备具有一定效率的染料敏化太阳电池***请不要用google等翻译工具，不然偶也不用提问了*********谢拉是太阳能电池方面的，以下是摘要中的一些专业词汇 TiO2纳米多孔薄膜 nano-sized TiO2 porous films 染料敏化太阳电池 Dye-sensitized Solar Cells 染料敏化剂 dye

Results:(1) CBC possesses a natural trabecular structure. Its components is similar to the mineral of bone.(2) CBC has great cellur biocompatibility. It can promote cell adhesion, proliferation and secretory while needn t modification.(3) In nude mice, the ectopic osteogenesis of MCCAB was obvious which was better than that of CBC alone and the new bone formation increased in pace with time. In the MCCAB, both intramembranous and cartilaginous osteogeneses were seen but the former dominated.(4) When MCCAB was autotransplanted intramuscularly, the osteogenesis was much better than that of negative control groups.(5) The MCCAB can repair autogenous calvaria defects effectively and the effect was much better than that of CBM alone and blank group. Conclusion:(1) CBC possesses good biocompatibility, osteoconduction and porous structure, can be used as scaffold material for constructing of tissue engineering bone.

结果：(1)CBC具有天然的多孔网状结构，最大程度地保持了骨矿的微结构特征，可以作为骨组织工程的支架材料；(2)CBC细胞亲和性好，不需作修饰即能促进成骨细胞的粘附、增殖和分泌活动；(3)MSO/CBC复合人工骨在裸鼠皮下异位成骨作用明显，兼有膜内成骨和软骨内成骨的特点，成骨效果明显优于单纯CBC植入组；(4)MSO/CBC复合人工骨兔自体肌袋异位成骨作用明显，血管化充分，成骨效果明显优于单纯CBC植入组；(5)MSO/CBC复合人工骨修复兔颅骨临界性缺损效果好，明显优于单纯植入CBC组和空白对第四旱区大学硕士学位论文一照组，可以作为骨移植替代材料用于骨缺损畸形修复。

Finally, the article discussed the possible mechanism of multi-phase electrochemical degradation of wastewater through the XPS spectrum of the used catalysts surface: In the acid solutions, the electro-generated O_2 may get electrons on the porous graphite cathode and then form H_2O_2, H_2O_2 may diffused to the surface of catalyst and reacted with its active part to produce OH, which in turn can destruct organics. The catalyst functioned as both the catalyst to decompose H_2O_2 and the flocculants to sedimentate the degraded waste.

最后全文结合研究反应后催化剂表面的XPS光电子能谱推断了该体系降解污废水可能的反应机理：在酸性条件下，石墨双阳极产生的O_2被多孔扩散性石墨阴极还原成H_2O_2，并通过扩散传质作用在催化剂的表面活性中心分解为强氧化性中间产物·OH，强氧化性攻击有机物，使其降解为小分子有机物或CO_2和H_2O，催化剂在体系中即起催化作用也起吸附、絮凝作用。

In chapter 4, the plane-radial and plane-parallel flows for Newtonian fluid in fractal porous media are analyzed. Based on the same assumption as that in chapter 3, the expressions for porosity, flow rate, velocity and permeability for both radial and parallel flows are developed. The proposed expressions are expressed as a function of tortuosity, fractal dimension, maximum and minimum pore diameters, and there are no empirical constant and every parameter has clear physical meaning in the proposed expressions.

第四部分研究了分形多孔介质中牛顿流体的平面径向和平行流动，考虑到实际毛细管的弯曲性和毛细管管径的分形分布，给出了径向和平行流动时的孔隙数目、孔隙率、流量、流速和渗透率的分形表达式；得到了分形多孔介质中微可压缩流体的压力分布方程；得到了无量纲的渗透率、压力和流速的解析表达式。

Analysis of experimental results confirm that the rising of temperature is equivalent to the reducing the frequency. The time-temperature equivalence is a commonness of saturated porous rocks.

试验结果表明，饱和多孔岩石都具有一个共同的特性－时间和温度的等效性，即降低温度与增加振动频率是等效的，这就是饱和多孔岩石的驰豫共性。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐